Jaw distraction device
The magnetically driven jawbone traction device is fully implanted into the cheek skin. It uses a magnetically controlled handle and transmission components to open up the jawbone, solving the infection and aesthetic problems of existing technologies and providing a safe and comfortable bone regeneration effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HOSPITAL OF STOMATOLOGY SUN YAT SEN UNIV
- Filing Date
- 2026-02-27
- Publication Date
- 2026-05-29
AI Technical Summary
Existing jawbone retraction devices require penetration of skin tissue or exposure inside the mouth, increasing the risk of wound infection, affecting appearance, and potentially causing facial nerve damage.
A jawbone traction device is designed, which uses a magnetic drive component and a transmission component. It is completely implanted into the skin tissue of the cheek. The screw is rotated by a magnetic control handle to avoid direct contact with the skin. The transmission component stores and releases energy to adjust the traction force and achieve jawbone opening.
It avoids wound infection and facial nerve damage, is safe and convenient to operate, reduces pain, and achieves a slow bone regeneration effect.
Smart Images
Figure CN122096932A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of oral and maxillofacial surgical instruments, and in particular to a jawbone traction device. Background Technology
[0002] Jawbone traction devices are widely used in oral and maxillofacial, cranial, and plastic surgery. The technical principle of these devices can be summarized as follows: First, the soft tissue surrounding the jawbone is incised. After the jawbone is completely or partially severed, the traction device is inserted. During a 5-7 day interval, callus forms at the bone fragments. Then, the traction device is used to controllably and stably gradually stretch the bone fragments apart. The traction force induces the body's own regenerative capacity, promoting the regeneration of bone tissue and its surface soft tissue, thereby achieving the goal of maxillofacial bone regeneration and lengthening. This technique utilizes the body's tissue regeneration potential to repair various congenital or acquired bone defects or deformities.
[0003] Existing jawbone traction devices use traction screws to move the traction device and bone cross-section, which requires penetrating skin tissue or being exposed inside the oral cavity. This not only increases the risk of wound infection but also causes skin scars that affect appearance and damages the facial nerve, leading to facial paralysis. Summary of the Invention
[0004] Therefore, it is necessary to provide a jawbone traction device that can completely close the wound and avoid perforation of the skin or mucous membrane.
[0005] A jawbone traction device, comprising: A jawbone traction device is used for complete implantation into the skin tissue of the cheek. The jawbone traction device includes a bracket, a lead screw, a fixed traction plate, a movable traction plate, a magnetic drive assembly, and a transmission assembly. The fixed traction plate is disposed on the bracket; the lead screw is rotatably disposed on the bracket; the movable traction plate is screwed onto the lead screw; the magnetic drive assembly is connected to one end of the lead screw through the transmission assembly. A magnetically controlled handle is located outside the cheek skin tissue. When the magnetically controlled handle approaches the magnetic drive assembly, the magnetic drive assembly can rotate under the magnetic traction of the magnetically controlled handle, thereby driving the lead screw to rotate around its own axis through the transmission assembly. This, in turn, drives the movable traction plate to move along the axis of the lead screw, thus making the distance between the movable traction plate and the fixed traction plate adjustable. The transmission assembly is used to store and release the energy output by the magnetic drive assembly.
[0006] In one embodiment, the transmission assembly includes a mainspring energy storage assembly, which includes an energy storage wheel and a mainspring wound on the energy storage wheel. The energy storage wheel is drively connected to the magnetic drive assembly and the lead screw. The magnetic drive assembly can drive the energy storage wheel to rotate so that the mainspring is wound and stores energy. When the mainspring is unloaded, it can drive the energy storage wheel to rotate in the opposite direction, thereby driving the lead screw to rotate.
[0007] In one embodiment, the transmission assembly further includes an escapement assembly that is drively connected to the mainspring energy storage assembly. The escapement assembly enables the energy storage wheel to rotate at a predetermined speed so that the mainspring can release energy at a uniform speed.
[0008] In one embodiment, the escapement assembly includes an escape wheel and an escape fork. The escape wheel is driven to the energy storage wheel and the lead screw. One end of the escape fork has a fork angle, and the other end of the escape fork has two escape arms spaced apart. The fork angle abuts against the energy storage wheel. The two escape arms intermittently engage with the escape wheel. When the mainspring is unloaded, it can drive the energy storage wheel to rotate. The energy storage wheel can drive the escape wheel to rotate. When the escape wheel rotates, it intermittently contacts the two escape arms, causing the escape fork to swing within a predetermined angle. This allows the two escape arms to intermittently engage or disengage with the escape wheel, causing the escape wheel to rotate intermittently. Consequently, the energy storage wheel rotates at a predetermined speed at a constant speed, achieving a constant-speed release of the mainspring's energy.
[0009] In one embodiment, the transmission assembly further includes a first gear set, through which the escape wheel is connected to the lead screw.
[0010] In one embodiment, the first gear set includes multiple sets, which are sequentially connected in a transmission manner. The escape wheel is connected in a transmission manner to the first first gear set, and the last first gear set is connected in a transmission manner to the lead screw.
[0011] In one embodiment, the first gear set includes a first gear and a second gear that are coaxially linked, the diameter of the first gear is larger than the diameter of the second gear, the escape wheel is drivenly connected to the first gear of the first gear set, and the second gear of the last gear set is drivenly connected to the lead screw.
[0012] In one embodiment, the transmission assembly further includes a second gear set, which includes a third gear and a fourth gear. The third gear is coaxially linked with the last of the first gear sets, and the fourth gear is coaxially connected to one end of the lead screw. The third gear and the fourth gear are connected in a transmission manner, and the axial direction of the third gear is perpendicular to the axial direction of the fourth gear.
[0013] In one embodiment, the magnetic drive assembly includes a first magnet and a third gear set, the third gear set including a fifth gear and a sixth gear, the fifth gear and the sixth gear being drively connected, and the axial direction of the fifth gear being perpendicular to the axial direction of the sixth gear, the first magnet being coaxially connected to the fifth gear, and the sixth gear being coaxially connected to the energy storage hairspring.
[0014] In one embodiment, the bracket includes a lead screw protective housing in which the lead screw is rotatably mounted along its length. The bottom end of the lead screw protective housing has a first opening extending along its length. A nut is provided on the movable traction plate. The nut passes through the first opening and is screwed onto the lead screw. The fixed traction plate is located at the bottom end of the lead screw protective housing.
[0015] The jawbone traction device provided in this application uses the principle of magnetic field as its power input structure. When the operator holds the magnetic control handle close to the magnetic drive component connected to the lead screw, the magnetic drive component can rotate under the magnetic traction of the magnetic control handle. This rotation drives the lead screw to rotate around its own axis via the transmission component, thereby moving the movable traction plate along the axis of the lead screw. This allows the distance between the movable traction plate and the fixed traction plate to be adjustable. The screw engagement between the lead screw and the movable traction plate provides self-locking limitation, and the movable traction plate and the fixed traction plate can open and hold the two ends of the jawbone apart. The jawbone traction device of this application is designed to be completely implanted into the cheek skin tissue, and the magnetic control handle is operated outside the cheek skin tissue. The magnetic force is used to drive the internal lead screw to rotate, eliminating the need for direct contact with the cheek skin tissue. This makes the operation convenient and safe, while avoiding the problem of wound infection and significant safety hazards that may occur with external jawbone traction devices.
[0016] Furthermore, the jawbone traction device of this application uses a transmission component to connect the magnetic drive component and the lead screw. The transmission component can pre-store the energy output by the magnetic drive component and then release the energy at a predetermined speed to drive the lead screw to rotate, thereby achieving the slow completion of the traction process within a set time. This can avoid problems such as wound infection, scar formation and nerve damage, and can also break down the traction process to reduce pain caused by one-time traction, thus improving the effect of traction to stimulate bone formation. Attached Figure Description
[0017] Figure 1 A schematic diagram of the jaw traction device provided in an embodiment of the present invention; Figure 2 for Figure 1 A cross-sectional view of the jawbone traction device shown in the diagram; Figure 3 A combined diagram of the magnetic drive assembly and the transmission assembly provided for embodiments of the present invention; Figure 4 This is a combined view of the magnetic drive assembly and transmission assembly provided for an embodiment of the present invention. Detailed Implementation
[0018] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.
[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.
[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
[0021] like Figures 1 to 3 As shown, this application provides a jawbone traction device 10, which includes a jawbone traction device 100 and a magnetic control handle 200. The jawbone traction device 100 is used to be completely implanted into the cheek skin tissue. The jawbone traction device 100 includes a bracket 110, a lead screw 120, a fixed traction plate 130, a movable traction plate 140, a magnetic drive assembly 150, and a transmission assembly 160. The fixed traction plate 130 is disposed on the bracket 110; the lead screw 120 is rotatably disposed on the bracket 110; and the movable traction plate 140 is screwed onto the lead screw 120. The magnetic drive assembly 150 is connected to one end of the lead screw 120 through the transmission assembly 160.
[0022] The magnetic control handle 200 is located outside the skin tissue of the cheek. When the magnetic control handle 200 approaches the magnetic drive assembly 150, the magnetic drive assembly 150 can rotate under the magnetic traction of the magnetic control handle 200. This rotation drives the lead screw 120 to rotate around its own axis via the transmission assembly 160, thereby driving the movable traction plate 140 to move along the axis of the lead screw 120. This makes the distance between the movable traction plate 140 and the fixed traction plate 130 adjustable. The transmission assembly 160 is used to store and release the energy output by the magnetic drive assembly 150.
[0023] The jaw traction device 10 provided in this application uses the principle of magnetic field action as its power input structure. When the operator holds the magnetic control handle 200 close to the magnetic drive assembly 150 connected to the lead screw 120, the magnetic drive assembly 150 can rotate under the magnetic traction of the magnetic control handle 200. This rotation, via the transmission assembly 160, drives the lead screw 120 to rotate around its own axis, thereby causing the movable traction plate 140 to move along the axis of the lead screw 120. This allows the distance between the movable traction plate 140 and the fixed traction plate 130 to be adjustable. Furthermore, the connection between the lead screw 120 and the movable traction plate 140 is utilized to make the distance between the movable traction plate 140 and the fixed traction plate 130 adjustable. The screw-in self-locking limit between the traction plates 140 allows the movable traction plate 140 and the fixed traction plate 130 to open and hold the two ends of the jawbone. The jawbone traction device 100 of this application is designed to be completely implanted into the cheek skin tissue, and the magnetic control handle 200 is operated outside the cheek skin tissue. The magnetic force is used as the driving force to drive the internal screw 120 to rotate, and the screw 120 is driven to rotate. It does not need to directly contact the cheek skin tissue, so the operation is convenient and safe. At the same time, it avoids the problem that external jawbone traction devices 100 may cause wound infection and have greater safety hazards.
[0024] Furthermore, the jaw traction device 10 of this application uses a transmission assembly 160 to drive the magnetic drive assembly 150 and the lead screw 120. The transmission assembly 160 can pre-store the energy output by the magnetic drive assembly 150, and then release the energy at a predetermined speed to drive the lead screw 120 to rotate, thereby realizing the traction process is completed slowly within a set time. This can avoid wound infection problems and break down the traction process to reduce pain caused by one-time traction.
[0025] Specifically, the movable traction plate 140 and the lead screw 120 are screwed together as a core control unit, and the lead screw 120 is driven by a helical pair: for each revolution of the lead screw 120, the movable traction plate 140 moves along the axial direction of the lead screw 120 by one pitch (the pitch can be designed to be p=0.5mm), so as to achieve the purpose of traction of the movable traction plate 140 to linear motion.
[0026] like Figure 3 and Figure 4As shown, the transmission assembly 160 further includes a mainspring energy storage assembly 170, which includes an energy storage wheel 171 and a mainspring 172 wound on the energy storage wheel 171. The energy storage wheel 171 is connected to the magnetic drive assembly 150 and the lead screw 120. The magnetic drive assembly 150 can drive the energy storage wheel 171 to rotate so that the mainspring 172 can be wound to store energy. When the mainspring 172 is unloaded, it can drive the energy storage wheel 171 to rotate in the opposite direction, thereby driving the lead screw 120 to rotate.
[0027] Specifically, the mainspring energy storage assembly 170 also includes a rotating shaft 173, an energy storage wheel 171 is disposed on the rotating shaft 173, the energy storage wheel 171 and the rotating shaft 173 are coaxially disposed, and the mainspring 172 is wound on the rotating shaft 173. The magnetic drive assembly 150 can drive the rotating shaft 173 to rotate and tighten the mainspring 172, so that the mainspring 172 stores energy through the rotation of the rotating shaft 173. When the mainspring 172 is unloaded, it can drive the energy storage wheel 171 to rotate in the opposite direction, thereby driving the screw 120 to rotate, so as to achieve the purpose of traction.
[0028] Furthermore, the transmission assembly 160 also includes an escapement assembly 180, which is connected to the mainspring energy storage assembly 170. The escapement assembly 180 enables the energy storage wheel 171 to rotate at a predetermined speed so that the mainspring 172 can release energy at a uniform speed, avoiding the instantaneous release of energy from the mainspring 172. This allows the traction process to be completed slowly within a set time, which can avoid wound infection and break down the traction process to reduce pain caused by a single traction.
[0029] Specifically, the escapement assembly 180 includes an escape wheel 181 and an escape fork 182. The escape wheel 181 is driven to connect the energy storage wheel 171 and the lead screw 120. One end of the escape fork 182 has a fork angle 183, and the other end of the escape fork 182 has two escape arms 184 spaced apart. The fork angle 183 abuts against the energy storage wheel 171, and the two escape arms 184 are intermittently engaged with the escape wheel 181. Specifically, the escape wheel 181 meshes with the energy storage wheel 171, and the fork angle 183 at one end of the escape fork 182 abuts against the pivot 173.
[0030] When the mainspring 172 releases its load, it drives the energy storage wheel 171 to rotate. The energy storage wheel 171 then drives the escape wheel 181 to rotate. When the escape wheel 181 rotates, it intermittently contacts the two escape arms 184, causing the escape fork 182 to swing within a predetermined angle. This allows the two escape arms 184 to intermittently engage or disengage from the escape wheel 181, resulting in the intermittent rotation of the escape wheel 181. Consequently, the energy storage wheel 171 rotates at a predetermined speed, achieving a constant-speed release of the energy from the mainspring 172. This prevents the energy from being released instantaneously, thus allowing the traction process to be completed slowly within a set time. This avoids wound infection and breaks down the traction process, reducing pain caused by a single traction action.
[0031] like Figure 3 and Figure 4 As shown, the transmission assembly 160 further includes a first gear set 190, through which the escape wheel 181 is connected to the lead screw 120. Multiple first gear sets 190 are sequentially connected, with the escape wheel 181 connected to the first first gear set 190 and the last first gear set 190 connected to the lead screw 120. Specifically, the escape wheel 181 meshes with the first first gear set 190, and multiple first gear sets 190 are sequentially meshed and connected.
[0032] Specifically, when the mainspring 172, which has stored energy, releases its force, the rotating shaft 173 drives the energy storage wheel 171 to rotate. The energy storage wheel 171 drives the escape wheel 181 to rotate. When the escape wheel 181 rotates, it intermittently contacts the two escape arms 184, causing the escape fork 182 to swing within a predetermined angle. This allows the two escape arms 184 to intermittently engage or disengage from the escape wheel 181, thus causing the escape wheel 181 to rotate intermittently. Consequently, the energy storage wheel 171 rotates at a predetermined speed, achieving a constant-speed release of energy from the mainspring 172. The intermittent rotation of the escape wheel 181 sequentially drives multiple first gear sets 190 to rotate intermittently, which in turn drives the lead screw 120 to rotate intermittently. This allows the traction process to be completed slowly within a set time, thus avoiding wound infection and breaking down the traction process to reduce pain caused by a single traction.
[0033] like Figure 3 and Figure 4As shown, further, the first gear set 190 includes a first gear 191 and a second gear 192 that are coaxially linked. The diameter of the first gear 191 is larger than the diameter of the second gear 192. The escape wheel 181 is driven by the first gear 191 of the first gear set 190, and the second gear 192 of the last gear set 190 is driven by the lead screw 120. The first gear 191 of one gear set 190 is driven by the second gear 192 of the adjacent gear set 190.
[0034] Furthermore, the transmission assembly 160 also includes a second gear set 193, which includes a third gear 194 and a fourth gear 195. The third gear 194 is coaxially linked with the last first gear set 190, and the fourth gear 195 is coaxially connected to one end of the lead screw 120. The third gear 194 and the fourth gear 195 are drively connected, and the axial direction of the third gear 194 is perpendicular to the axial direction of the fourth gear 195. Specifically, the third gear 194, which is coaxially linked with the last first gear set 190, and the fourth gear 195, which is coaxially connected with the lead screw 120, mesh at 90°, thereby reducing the axial dimension of the jaw traction device 10 on the lead screw 120 while satisfying the rotational drive requirement of the lead screw 120.
[0035] The magnetic drive assembly 150 includes a first magnet 151 and a third gear set 152. The third gear set 152 includes a fifth gear 153 and a sixth gear 154. The fifth gear 153 and the sixth gear 154 are connected in a transmission manner, and the axial direction of the fifth gear 153 is perpendicular to the axial direction of the sixth gear 154. The first magnet 151 is coaxially connected to the fifth gear 153, and the sixth gear 154 is coaxially connected to the energy storage hairspring 171.
[0036] Specifically, when the magnetic control handle 200 approaches the first magnet 151, the first magnet 151 rotates under the magnetic traction of the magnetic control handle 200. This rotation drives the energy storage spring wheel 171 to rotate via the meshing transmission between the fifth gear 153 and the sixth gear 154, which in turn drives the lead screw 120 connected to it to rotate around its own axis. This, in turn, drives the movable traction plate 140 to move along the axis of the lead screw 120. Furthermore, the fifth gear 153, coaxially connected to the first magnet 151, and the sixth gear 154, coaxially connected to the energy storage spring wheel 171, mesh at 90°. This allows for a reduction in the axial dimension of the jawbone traction device 10 of the lead screw 120 while still satisfying the requirement for rotational drive of the lead screw 120.
[0037] like Figure 2As shown, the jawbone traction device 10 further includes a housing 300, and at least a portion of the transmission assembly 160 is housed within the housing 300. Specifically, the first magnet 151, the bracket 110, the lead screw 120, the fixed traction plate 130, and the movable traction plate 140 are all disposed outside the housing 300, while the fifth gear 153 and the sixth gear 154 are both disposed within the housing 300, and the connecting shaft of the fifth gear 153 passes through the housing 300 and is connected to the first magnet 151. The spring energy storage assembly 170, the escapement assembly 180, and each of the first gear sets 190 are all disposed within the housing 300, and the third gear 194 and the fourth gear 195 are also disposed within the housing 300.
[0038] Furthermore, the jaw traction device 10 also includes a drive shaft 400, one end of which is connected to the lead screw 120, and the other end of which extends into the housing 300 and is connected to the fourth gear 195.
[0039] Furthermore, the jaw traction device 10 also includes a coupling 500, which is located outside the housing 300. One end of the drive shaft 400 is connected to the lead screw 120 through the coupling 500. Specifically, one end of the drive shaft 400 and one end of the lead screw 120 are respectively inserted into the two ends of the coupling 500, and the drive shaft 400, coupling 500, and lead screw 120 are coaxially arranged. Furthermore, the jaw traction device 10 also includes a coupling cover 600, which is sleeved on the outside of the coupling 500.
[0040] like Figure 2 As shown, the bracket 110 further includes a lead screw protective shell 111, in which a lead screw 120 is rotatably mounted along its length. The bottom end of the lead screw protective shell 111 is provided with a first opening extending along its length. A nut 142 is provided on the movable traction plate 140. The nut 142 passes through the first opening and is screwed onto the lead screw 120. A fixed traction plate 130 is provided at the bottom end of the lead screw protective shell 111. The bottom end face of the lead screw protective shell 111 is a plane.
[0041] Furthermore, both ends of the lead screw 120 extend out of the lead screw protective housing 111 through the second openings at both ends of the lead screw protective housing 111 along its length.
[0042] like Figure 2As shown, the jawbone traction device 10 further includes a sliding bearing 700, which is mounted on the lead screw protective housing 111. The lead screw 120 is supported and mounted on the lead screw protective housing 111 via the sliding bearing 700. Further, there are two sliding bearings 700, which are respectively mounted at both ends of the lead screw protective housing 111 along its length. Both ends of the lead screw 120 pass through the two sliding bearings 700. Specifically, in this embodiment, one end of the lead screw 120 passes through one of the sliding bearings 700 and extends out of it, while the other end of the lead screw 120 is inserted into the other sliding bearing 700. The coupling cover 600 is a hollow structure with openings at both ends, and one end of the coupling cover 600 is connected to the sliding bearing 700 through which the lead screw 120 passes.
[0043] Furthermore, the magnetic control handle 200 includes a handle housing and a drive unit, a second magnet, and a third magnet disposed within the handle housing. The drive unit is capable of driving the second magnet and the third magnet to rotate within the handle housing.
[0044] Specifically, using the principle of magnetic repulsion and attraction between like poles as the power input, the magnets on the magnetic control handle 200 and the lead screw 120 are equipped with S / N magnetic poles. The two rotatable magnets (i.e., the second magnet and the third magnet) of the magnetic control handle 200 rotate around their own axis, driving the magnetic field to move. The magnet (i.e., the first magnet 151) of the jawbone traction device 100 is affected by the change in the magnetic field and is pulled to rotate, driving the lead screw 120 connected to it to rotate. This drives the movable traction plate 140 to move along the axis of the lead screw 120. The screw engagement between the lead screw 120 and the movable traction plate 140 is self-locking and limiting. The movable traction plate 140 and the fixed traction plate 130 can open and hold the two ends of the jawbone.
[0045] Furthermore, the magnetic control handle 200 also includes a sensor, which may be, but is not limited to, a Hall sensor. The sensor is disposed inside the handle housing and located between the second magnet and the third magnet. The sensor is used to sense changes in the magnetic field between the second magnet and the third magnet, thereby detecting the rotational motion state of the first magnet 151 of the jawbone traction device 100.
[0046] like Figure 1 As shown, both the movable traction plate 140 and the fixed traction plate 130 are provided with multiple mounting holes 132 for fasteners to pass through. By providing mounting holes 132 for fasteners to pass through on the two traction plates, the jaw traction device 10 can be conveniently and quickly connected to the patient's jawbone section using the traction plates.
[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0048] The above embodiments merely illustrate preferred implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention should be determined by the appended claims.
Claims
1. A jawbone traction device, characterized in that, include: A jawbone traction device is used for complete implantation into the skin tissue of the cheek. The jawbone traction device includes a bracket, a lead screw, a fixed traction plate, a movable traction plate, a magnetic drive assembly, and a transmission assembly. The fixed traction plate is disposed on the bracket; the lead screw is rotatably disposed on the bracket; the movable traction plate is screwed onto the lead screw; the magnetic drive assembly is connected to one end of the lead screw through the transmission assembly. A magnetically controlled handle is located outside the cheek skin tissue. When the magnetically controlled handle approaches the magnetic drive assembly, the magnetic drive assembly can rotate under the magnetic traction of the magnetically controlled handle, thereby driving the lead screw to rotate around its own axis through the transmission assembly. This, in turn, drives the movable traction plate to translate along the axis of the lead screw, thus making the distance between the movable traction plate and the fixed traction plate adjustable. The transmission assembly is used to store and release the energy output by the magnetic drive assembly.
2. The jawbone traction device according to claim 1, characterized in that, The transmission assembly includes a mainspring energy storage assembly, which includes an energy storage hairspring wheel and a mainspring wound on the energy storage hairspring wheel. The energy storage hairspring wheel is connected to the magnetic drive assembly and the lead screw. The magnetic drive assembly can drive the energy storage hairspring wheel to rotate so that the mainspring is wound and stores energy. When the mainspring is unloaded, it can drive the energy storage hairspring wheel to rotate in the opposite direction, thereby driving the lead screw to rotate.
3. The jawbone traction device according to claim 2, characterized in that, The transmission assembly also includes an escapement assembly, which is connected to the mainspring energy storage assembly. The escapement assembly enables the energy storage wheel to rotate at a predetermined speed so that the mainspring can release energy at a uniform speed.
4. The jawbone traction device according to claim 3, characterized in that, The escapement assembly includes an escape wheel and an escape fork. The escape wheel is driven by the energy storage wheel and the lead screw. One end of the escape fork has a fork angle, and the other end has two escape arms spaced apart. The fork angle abuts against the energy storage wheel. The two escape arms intermittently engage with the escape wheel. When the mainspring is unloaded, it can drive the energy storage wheel to rotate. The energy storage wheel can drive the escape wheel to rotate. When the escape wheel rotates, it intermittently contacts the two escape arms, causing the escape fork to swing within a predetermined angle. This allows the two escape arms to intermittently engage or disengage with the escape wheel, causing the escape wheel to rotate intermittently. Consequently, the energy storage wheel rotates at a predetermined speed at a constant speed, achieving a constant-speed release of the mainspring's energy.
5. The jawbone traction device according to claim 3, characterized in that, The transmission assembly also includes a first gear set, through which the escape wheel is connected to the lead screw.
6. The jawbone traction device according to claim 5, characterized in that, The first gear set includes multiple sets, which are sequentially connected in a transmission manner. The escape wheel is connected in a transmission manner to the first first gear set, and the last first gear set is connected in a transmission manner to the lead screw.
7. The jawbone traction device according to claim 6, characterized in that, The first gear set includes a first gear and a second gear that are coaxially linked. The diameter of the first gear is larger than the diameter of the second gear. The escape wheel is connected to the first gear of the first gear set, and the second gear of the last gear set is connected to the lead screw.
8. The jawbone traction device according to claim 7, characterized in that, The transmission assembly further includes a second gear set, which includes a third gear and a fourth gear. The third gear is coaxially linked with the last of the first gear sets, and the fourth gear is coaxially connected to one end of the lead screw. The third gear and the fourth gear are connected in a transmission connection, and the axial direction of the third gear is perpendicular to the axial direction of the fourth gear.
9. The jawbone traction device according to claim 2, characterized in that, The magnetic drive assembly includes a first magnet and a third gear set. The third gear set includes a fifth gear and a sixth gear. The fifth gear and the sixth gear are connected in a transmission manner, and the axial direction of the fifth gear is perpendicular to the axial direction of the sixth gear. The first magnet is coaxially connected to the fifth gear, and the sixth gear is coaxially connected to the energy storage hairspring.
10. The jawbone traction device according to claim 1, characterized in that, The bracket includes a lead screw protective shell, in which the lead screw is rotatably mounted along its length. The bottom end of the lead screw protective shell is provided with a first opening extending along its length. A nut is provided on the movable traction plate. The nut passes through the first opening and is screwed onto the lead screw. The fixed traction plate is provided at the bottom end of the lead screw protective shell.